More hp

I have a 03 gmc sierra 1500 ext cab 4x4 with a 5.3l v8. I want it to have 100 more hp how can I do that? Also would like to make my rear end way stronger than the stock version. Please would love any advice.

F_O_R is, as usual, correct. You can use the rear end out of a 2500 and be just fine
well up into the high HP range. However, the tougher...and more expensive....part is
adding 100HP. That is no easy feat and will DEFINITELY require forced induction. If
anyone comes in here and says "Just slap a huge shot of nitrous on it", don't.
Unless, of course, you have the cash to replace the motor. 100HP means you're
probably looking at an intercooled Vortec supercharger kit. How is your budget for
this? With the supercharger, supporting mods (fuel injectors, fuel pump, belts, all the
little bells and whistles required) and a good dyno tune you're looking at spending
around $10k, no joke and that's a minimum. To get the most out of the blower, you'll
need to get long tube headers, an aftermarket intake, and likely new gears as I don't
know your ratio but you'll want 3.73's at a minimum. Budget $15k and you should be
good. Just keep in mind....for $15k, you can get a car that can haul butt and drive
that when you want while still having your truck as a daily driver. Car examples that
can be had under $15k include: 1998 - 2002 Camaro Z28 and SS models, 1999 and
2001 SVT Cobra models, some 1998 - 2004 Corvettes, 1998 - 2002 Trans Am WS6
cars.....just depends what you want. Just throwing some options out there.

This is the fourth time this transmission has been out of this truck I don't want
to put it back in again. I'm looking for an upgrade. I would prefer something
with more years. In 94 the speed limit...

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